Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d29faf01e350a03…

MALICIOUS

PDF

72.1 KB Created: 2021-03-16 22:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4d2f6a0034244e25dd3c0177419e1a71 SHA-1: 26e50b7c2af6ae4bacc4435a08eda96eeb38f29d SHA-256: 0d29faf01e350a031d64c6cd07f99e8f8de0547035de63a69c839fe3433aea38
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with at least one identified as a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'character description worksheet pdf', which is likely a pretext to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/award?keyword=character+description+worksheet+pdf In PDF document text
    • http://nemugub.mywebcommunity.org/chess_puzzle_king_solutions.pdfIn PDF document text
    • http://vknart.xyz/deadpool_marvel_cinematic_universe_wikinzvml.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/hp_officejet_pro_8600_plus_all-in-one_inkjet_printertsn6h.pdfIn PDF document text
    • http://eagleaff.com/scada_supervisory_control_and_data_acquisition5g1c4.pdfIn PDF document text
    • http://bostpolamos.site/xudizubezipalsk56.pdfIn PDF document text
    • http://xafawotilujos.mypressonline.com/boxinazijelikimu.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/nenopekimuvam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_386f0058120244beb7c77e7337ad8a32.pdf?index=trueIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_4c1038ee968a4f2cae1cf2a251ba6207.pdf?index=trueIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_6b0735ede1244679a44f44ef468fc64b.pdf?index=trueIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_405f8a5e63a14d7897eec682a5f178d6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8a9352-4658-49fc-8b5c-ef649e5526e2/state_two_primary_reasons_for_writing_a_business_plan.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_b9fa98f585e84656bb9765566dac4929.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e70c8c-6c48-4cba-a8de-81bdb17b72a2/87351112733.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/lofidupiwediberaw.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_55d9740c6bc9484ba0e387483b53bd27.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1fd54da-263f-44f2-8c3e-3f85be8497c2/roles_and_functions_of_social_workers_ppt.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_775f3ef89e7b4508a376ab633f426f59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/1791891115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c78ffd7-b49f-4c68-b00f-e51f0b4798a1/dewey_quotes_education_and_democracy.pdfIn PDF document text
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_7a1e49efe6174918a8d7afc264c537d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/background_hd_car_photo.pdfIn PDF document text
    • https://755d026c-fd58-4633-9ca9-8af24261f473.filesusr.com/ugd/4622eb_681101d6e2984950b9f8aede01b9e9ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/27846150718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21455fa7-ec65-44fe-8291-f867ebf280b8/the_band_the_last_waltz_cd_track_list.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC15 5272 bytes
SHA-256: 8487c8b8492b3722f992d5249c424d82b715f997968079fc00b654744a1a6aab
font_01_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 10124 bytes
SHA-256: 227470be902110371761d8f255fc6f3158b47013c771f52d7aaf91773017f911

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